richard thomas
|
| posted on 26/7/06 at 08:38 PM |
|
|
Best way to get off the line??
Hi all,
Been out in car, feels very quick and all, however...
Out of interest i tried a 0-60 from standstill. First attempt just under 6 seconds. VERY disappointed.
Tried another whilst just slightly rolling and got it down to 4 secs. Still not overjoyed, expected a bit quicker, 3.5 or something. Whilst i
appreciate that i was carrying a passenger at the time, what is the best way to get off the line without bogging down which is what i seem to be
doing. Am i just applying too much mechanical sympathy?It sounds terrific at 11,000 but i still wince a bit (soft b*****d) and expect it to go pop.
What technique do you guys use to get off the line??
Rich.
|
|
|
|
|
jacko
|
| posted on 26/7/06 at 08:47 PM |
|
|
Maybe you need to fit a PINTO
Jacko
|
|
|
richard thomas
|
| posted on 26/7/06 at 08:51 PM |
|
|
Would have been a quicker build and a lot cheaper but if i'd wanted to use an agricultural engine i'd have built a tractor.......
Only joking
Rich.
|
|
|
stevec
|
| posted on 26/7/06 at 08:55 PM |
|
|
(quote) Tried another whilst just slightly rolling and got it down to 4 secs. Still not overjoyed, expected a bit quicker, 3.5 or something.
Aint life a bitch?
[Edited on 26/7/06 by stevec]
[Edited on 26/7/06 by stevec]
|
|
|
jacko
|
| posted on 26/7/06 at 08:59 PM |
|
|
Have you had a look at the videos on the mk drag day at york the cec seem to get of the line better then the bec's . having said that i would
love to have a engine like you Jacko
|
|
|
richard thomas
|
| posted on 26/7/06 at 09:01 PM |
|
|
Do you experience any vibration from the back end when pulling off? I think my Diff is knacked and wonder if it's causing extra drag or
something...
Rich.
|
|
|
richard thomas
|
| posted on 26/7/06 at 09:01 PM |
|
|
Do you experience any vibration from the back end when pulling off? I think my Diff is knacked and wonder if it's causing extra drag or
something...
Rich.
|
|
|
marcyboy
|
| posted on 26/7/06 at 09:19 PM |
|
|
i think it would be totally off topic to talk about "pulling off" in here
|
|
|
richard thomas
|
| posted on 26/7/06 at 09:24 PM |
|
|
On the contrary, it's been on my mind all afternoon!!!
|
|
|
skydivepaul
|
| posted on 26/7/06 at 09:37 PM |
|
|
Can be quite tricky getting it right in a BEC. you need to try a bit more of a hooligan tecnique.
i find around 6.5K drop the clutch and feather the throttle then once the wheelspin stops floor it. thats the tecnique i use for sprint and hillclimb
starts.
tecnique 2: florr it and have it bouncing of the rev limiter and let the clutch up
not as quick but very impressive.
either tecnique will raise a few eyebrows if you are performing it on the queens highway
It is all or nothing with the BEC you either bog it down or a bit of wheelspin and whoooooooooooosh your off
why cant i spell tecnique........it looks wrong
[Edited on 26/7/06 by skydivepaul]
http://www.smartideasuk.com
http://www.smartmapping.co.uk
HD CCTV
3D design solutions and integration
IP security systems
access control systems
|
|
|
ChrisGamlin
|
| posted on 26/7/06 at 09:41 PM |
|
|
Best launch technique Ive found is hold the revs at ~6-7k, then bring the clutch up as fast as you can (but dont sidestep) and feather the throttle to
control the wheelspin. This was giving me fairly consistent standing quarter times / speeds and I recorded 9.8s to 100mph on my Digidash during the
one run I remembered to record.
How heavy is your car though? Unless its not much above 400kgs I personally think you'll be lucky to get it down significantly below 4s anyway,
especially on normal tarmac. Westfield quote 3.5 for the Megabusa but that was recorded on a drag stip IIRC, so probably much grippier surface.
I assume you're using some dash setup to record it, but if you're just timing with a stopwatch then there's so much error in
reaction times etc that you'll be lucky to be accurate to within 0.5s anyway.
Chris
[Edited on 26/7/06 by ChrisGamlin]
|
|
|
richard thomas
|
| posted on 26/7/06 at 09:46 PM |
|
|
Ahh,I had a feeling that i was being a bit of a girl.... must try harder tomorrow!! ( if my diff holds out...) Will take ear plugs! Brutal tec(h)nique
will be applied
Any advice for getting into hillclimbing, Paul? Built it with that sort of thing in mind but not followed it up as yet. Not really into going round in
circles on a track with other people getting too close to my gelcoat....
Rich.
|
|
|
richard thomas
|
| posted on 26/7/06 at 09:52 PM |
|
|
Thanks, Chris. To be honest I was using an analogue clock with the speedo ( the speedo is spot on) so there is a lot of error involved as you say.
The car is around 465 kilos so maybe it's as fast as i can expect.. (i weigh 16.5 stone myself). Was going off Baz Busa's figures for the
0-60, to be honest the car feels really quick but i was expecting a touch more fear factor.....
Will have to stop eating maybe!!!
Rich.
|
|
|
skydivepaul
|
| posted on 26/7/06 at 10:03 PM |
|
|
Any advice for getting into hillclimbing, Paul? Built it with that sort of thing in mind but not followed it up as yet. Not really into going round in
circles on a track with other people getting too close to my gelcoat....
Rich.
plenty of advice for you rich.
1. sort the car out get it running how you want it
2. buy a helmet, racesuit and all the other bits and bobs you will need £1000.00 gone!!!!
3. get a race licence. national B speed. easy just fill in the form and send off £35.00 and a picture.
4. join a motor sports club
5. sort out some events / championship you want to do
6. buy a trailer
7. do some trackdays. get used to the car
8. compete in your first event.
9. decide you are not quick enough
10. spend more money on the car
11. do more track days
12. compete in more events
13. repeat steps 9 to 12 as necessary
seriously its great fun and very addictive. we have plenty of events around yorkshire but i am not sure about wales see this
threadlinky
[Edited on 26/7/06 by skydivepaul]
http://www.smartideasuk.com
http://www.smartmapping.co.uk
HD CCTV
3D design solutions and integration
IP security systems
access control systems
|
|
|
bike_power
|
| posted on 26/7/06 at 10:11 PM |
|
|
I agree with Chris G, but you must take up the slack in the drive line first or you'll just start breaking things like the diff or the
gearbox.
Let the clutch bite, increase the accelerator to stop it stalling and release/feather the clutch - this is very difficult because you want a small
amount of wheelspin, not dirty great gobfulls of it.
As soon as the clutch is up make sure the accelerator is at no more than required to keep the wheels gently scuffing away. As soon as they grip, or
in fact after a bit of practice, just the moment before they grip, you floor the accelerator and get ready to grab second with just a small lift of
the accelerator.
Wheelspin is bad, you need just enough to break traction when you start and to keep the wheels spinning until you can fully engage the clutch, the
wheelspin is only required to avoud burning the clutch - you can burn the clutch 20 times then pay £120 or spin the wheels 100's of times and
pay £200, if you see what I mean
|
|
|
skydivepaul
|
| posted on 26/7/06 at 10:24 PM |
|
|
I agree with the above comments, you do not want to sidestep or let the clutch come up of its own accord. remember these engines, carbs and clutches
are designed for hand controls with which you have far greater finesse than with foot pedals.
you need to let the clutch out really quick but it has to be fed out progressively. takes a bit of practice to get right though.
as said on this thread earlier 0-60 in 3.5 seconds is pub talk. you will need a road surface like that of a good race track and slicks or A048s and
the like to acheive it................................oh and an 8 stone driver
http://www.smartideasuk.com
http://www.smartmapping.co.uk
HD CCTV
3D design solutions and integration
IP security systems
access control systems
|
|
|
richard thomas
|
| posted on 26/7/06 at 10:39 PM |
|
|
Forget the diet, with a trickshifter i don't need both legs, and my left arm is useless at holding a pint glass anyway....amputation is the
key!! Or maybe a dose of that necrosis virus thing....i will be lighter!!!!
Regarding the hillclimb tips. i have a trailer, nearly there now
Thanks guys, food for thought - oops, there i go again
Rich.
PS getting the clutch to bite is a tricky thing - i have a westfield hyd clutch mechanism fitted and it is like a switch....on/off but they are all
like that i believe?? seems more progressive when colder though.
[Edited on 26/7/06 by richard thomas]
|
|
|
tom windmill
|
| posted on 26/7/06 at 11:31 PM |
|
|
hey,
im sure all the guys who were at york dragway will tell you that you need to speak to my dad about getting off the line he realy knows how to give it
some stick he's so fast of the line he made the others look like they were standing still!! OR NOT!!!!! sorry not realy much use but i am
not going to let hime live it down!!
Tom!
|
|
|
mandbsheldon
|
| posted on 27/7/06 at 02:35 PM |
|
|
Best way to get off the line quickly
Follow someone in a indy s2000
Leigh
|
|
|
richard thomas
|
| posted on 28/7/06 at 08:24 PM |
|
|
Coming to the conclusion that however badly I get off the line, it's still putting the fear of God into my pals that have been out for a ride in
it....me too, truth be known - 'specially when it got air at 60 on a bumpy lane and landed a touch sideways...I need a quickrack
Rich.
|
|
|
DIY Si
|
| posted on 28/7/06 at 08:29 PM |
|
|
I'd suggest noit worrying about it for a good while. Having recently got an Indy 'Bird, I'm only just getting used to going round
corners at silly speeds. Still shocking myself with the loud pedal from time to time too. Which is nice.
|
|
|
richard thomas
|
| posted on 28/7/06 at 08:42 PM |
|
|
Yes, I did suggest earlier in this thread that I thought it might have felt a little quicker but after my in-flight episode I have come to respect the
little beasty a tad more
Rich.
|
|
|
